/*
 * Copyright (C) 2012-2016 Markus Junginger, greenrobot (http://greenrobot.org)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.greenrobot.eventbus.meta;

import org.greenrobot.eventbus.EventBusException;
import org.greenrobot.eventbus.SubscriberMethod;
import org.greenrobot.eventbus.ThreadMode;

import java.lang.reflect.Method;

/** Base class for generated subscriber meta info classes created by annotation processing. */
public abstract class AbstractSubscriberInfo implements SubscriberInfo {
  private final Class subscriberClass;
  private final Class<? extends SubscriberInfo> superSubscriberInfoClass;
  private final boolean shouldCheckSuperclass;

  protected AbstractSubscriberInfo(
      Class subscriberClass,
      Class<? extends SubscriberInfo> superSubscriberInfoClass,
      boolean shouldCheckSuperclass) {
    this.subscriberClass = subscriberClass;
    this.superSubscriberInfoClass = superSubscriberInfoClass;
    this.shouldCheckSuperclass = shouldCheckSuperclass;
  }

  @Override
  public Class getSubscriberClass() {
    return subscriberClass;
  }

  @Override
  public SubscriberInfo getSuperSubscriberInfo() {
    if (superSubscriberInfoClass == null) {
      return null;
    }
    try {
      return superSubscriberInfoClass.newInstance();
    } catch (InstantiationException e) {
      throw new RuntimeException(e);
    } catch (IllegalAccessException e) {
      throw new RuntimeException(e);
    }
  }

  @Override
  public boolean shouldCheckSuperclass() {
    return shouldCheckSuperclass;
  }

  protected SubscriberMethod createSubscriberMethod(String methodName, Class<?> eventType) {
    return createSubscriberMethod(methodName, eventType, ThreadMode.POSTING, 0, false);
  }

  protected SubscriberMethod createSubscriberMethod(
      String methodName, Class<?> eventType, ThreadMode threadMode) {
    return createSubscriberMethod(methodName, eventType, threadMode, 0, false);
  }

  protected SubscriberMethod createSubscriberMethod(
      String methodName, Class<?> eventType, ThreadMode threadMode, int priority, boolean sticky) {
    try {
      Method method = subscriberClass.getDeclaredMethod(methodName, eventType);
      return new SubscriberMethod(method, eventType, threadMode, priority, sticky);
    } catch (NoSuchMethodException e) {
      throw new EventBusException(
          "Could not find subscriber method in "
              + subscriberClass
              + ". Maybe a missing ProGuard rule?",
          e);
    }
  }
}
